How do I check if my gas is leaking?

Checking for a gas leak safely involves a combination of sensory observations and reliable diagnostic techniques without ever risking an open flame or electrical spark. First, rely on your sense of smell to detect any sulfur or rotten egg odors, and listen closely near gas supply lines, valves, and appliance connections for a faint hissing or whistling sound. Second, you can perform the classic soap-and-water test by mixing a solution of liquid dish soap and water in a spray bottle, then applying it liberally along all pipe joints, valves, and flexible connectors. If active gas is escaping, the pressure will cause bubbles to rapidly form and grow within the soapy mixture. Third, you can use a digital combustible gas detector. You can verify that a joint is secure when no bubbles or alarms occur.